Adding-machine.



UNITED STATES PATENT OFFICE.

GEORGE COBDTS, 0F NEW YORK, N. Y., A SSGNOR TO CHARLES E. DRESSLER, 0FNET-3f YORK, N. Y.

ADDNG-MACHENE.

Speccation of Letters Patent.

nat-@need May 15, 191e.

Applicatin mea May 1s, 1912. serial No. 698,088.

To all whom t 'may concern.'

Be it lmown that I, GEORGE Coeurs, citizen of Germany, residing at NewYork, county and State of New York, have invented new and usefulImprovements in Adding-Machines, of which the following is aspeciication.

This invention relates to adding machines and has in view the productionof a machine that is cheap, simple, compact, easy to construct,manipulate and repair and which is not liable to get out of order, allas will be explained in the following description and claims and thedrawing, in which- 4 Figure 1 is a top view,partly in section of themachine with the cover removed,

Fig. 2 is a section partly inelevation on the line 2-2 of Fig. 1,

Fig. 3 is a top view of the machine,

Fig. 4 is a side elevation of one `side of a digit wheel, j

Fig. 5 is a side elevation of the other side .of the digit wheel,

Fig. 6 is a transverse vertical section of a digit wheel,

v Fig. 7 is an elevation of the rack and pinion used to set thepropelling wheel 0pposite any digit wheel,

Fig. 8 is an elevation of the segment and lever used in advancing adigit wheel any desired number of digits, and

Fig. 9 is a plan view of a disk placed adjacent to a digit wheel.

Referring to the drawing there is shown a container or casing 10, whichfor convenience may be separable into two or more parts. On the casing10 are supported two `shafts 11 and 12, the former carrying the digit oradding wheels 13, and the latter carrying a propelling wheel 29, whichmoves the digit wheels when the operation of addition is carried on. Thedigit wheels are in the form of toothed wheels having the successivedigits 1 to 9 and 0 on the apex of the teeth as shown in Figs. 1 and 6.On the left 4side of each of the digit wheels is placed a disk 15, whichhas a circular portion 16 and a flat portion 16 at its periphery, and aprojection 17 fitting' in a corresponding groove 22 in the shaft 11 sothat it Will rotate with the shaft.

A pawl 18 pivotally carried on the side of each bdigit wheel rests ontheperimeter of the disk 15 and is caused to yieldingly engage therewithby a spring 19. When the pawl moves on the edge of the circular porof awheel 25, which is fixed to a disk '24, both revolubly mounted on theshaft l2.

Fixed to the shaft 12 is a ratchet wheel 27 having ten teeth 28. A pawl35 pivotally carried by the disk 34 is caused to engage with the teethof the ratchet wheel 37 by a spring 36. Mountedon the shaft 18 to haveaxial adjustment `thereon and rotate therewith is a wheel 29. This wheelhas teeth 30 adapted to mesh with the teeth of either of the digitwheels 13 and impart movement to the latter when the shaft 12 is rotatedin anti-clockwise direction. The segment 23 is moved forward andbackward by a lever 24. As it is moved forward it will rotate the pinion25 and connected pawl carrying disk 34 the pawl 35 riding over the teethof the ratchet wheel 27 and as the Vlever is returned to initialposition the pinion 25 will be rotated in a reverse direction and thepawl 35 will engage with the teeth in the ratchet wheel 27 rotating theshaft 12 and thereby the propelling wheel 29. The wheel 29 is adjustedon the shaft 12 by a rack 37 connected at one end t0 a plate 4() whichis mounted on the hub 41 of the wheel 29 and held in place by a plate'42, the rack being actuated by a pinion 38 meshing with the rack, saidpinion being fixed to a shaft which is rotated by a milled head 39 fixedthereto.

The digit wheels 13 are frictionally held in adjusted position by thesprings 43v pressing against pins 33 extending laterally from the teethof the wheels. `To the right of the digit Wheels 13 is a disk 44 havingan indentation 45 into which fits the top of a lspring 46 whichpressesagainst it and gir-:es

to the-digit wheels. a definite and accurate zero position when the hubof the spring 4G engages inthe indentation ll5.

On the top of the casing there is a slot 47 through which are visiblethe various numerals or digits von the apex ofthe teeth of the Wheels 13as they are revolved. There is also a slot 48 in the casing in whichmoves an index or projection 50 extending from the plate 40 connected tothe propelling Awheel which indicates opposite which digit wheel thepropelling wheel 29 is placed, a row of numerals 49 adjacent to the slotbeing provided for the purpose. l

".he'leVer 24 moves in a slot 51 in the casing,l a series of numerals 52indicating the extent to which the lever should be moved to rotate thepropelling lwheel a pre-determined number oftooth spaces. In order toreturn the adding wheels to' zero position the @shaft 11 is rotated by amilled head -53,

a pawl pivotally` carried by each digit wheel falling into the slot orgroove 22 in the' shaftand thereby coupling said wheels to the than. j

The operation of thel machine is as follows; The propelling wheel 29 isfirst broughtopposite the desired digit wheel 13. If units are desiredit is adjusted so that the teeth of such wheelwill be in connection withthe teeth of the first digit wheel; if tens are desired it is adjustedtocop'erate withl the second digit wheel, etc. After the propellingwheel has been properly adjusted the lever 24 is pulled .forward untilit is opposite the digit or numeral on the scale 52 .corresponding tothe number to be added, and is then returned to initial position.Simultaneously with the forward movement of the lever the pinion 25 andconnected pawl carrying disk 34 is rotated causing pawl' to ride overthe teeth ofthe ratchet Wheel .27, and upon the return movement of theleverth'e pinion 25 and disk 34 are rotated in opposite directioncausing the pawl to engage with`t the ratchet wheel 27 and operativelyconnecting the propelling wheel to the pinion 25, requisite number ofVsteps or tooth spaces and through. 'it the corresponding digit wheel,and .the number opposite which the lever 2a is placed is added andindicated by the digit Wheels through the slot a7. Units, tens, hundredsand all other denominations are added in the same manner. When thefigure added produces a sum above ten the pawl 18 acts on the ratchetwheel of an adjacent number Wheel moving it forward'one step whereby ineach case addition of figures of any denomination is carried on beyondthe nine digits of each digit wheel. In the setting of the numerals atzero the milled head 53 1s rotated thereby rotating the shaft 11, thevariousA pawls 54 drop intol the slot 22 in the shaft whereby thewheelsand is turned the casing; a plurality are coupled thereto,the head 53being rotated until all of the digit wheels assume the zero positionwhich will be indicated through the slot '47 when a new adding operationmay be repeated` lVhat I claim as new is:

1. In an adding machine tlie combination of ashaft; a plurality of,toothed wheels having digits on the apex of the teeth mounted on saidshaft in juxtaposed relation; atoothed'propelling lwheel rotatable andadjustable on an axis parallelwith the axis of the digit in onedirection; means carried by the digit wheels cooperating when made acomplete revolution to advance the next adjacent digit wheel of higherdenomination one tooth space, compr1sing a pavvl carried upon the sideof each digit wheel, a

disk having a lat portion fixed on the shaft the perimeter of whichdisks the pawls engage, and a ratchet wheel connected to the side of thewheel of the next higher denomination With which the pavvls coperate asthey pass over the flat portions oi" the disks; Vmeans to manuallyrotate the digit wheel shaft; and a pawlA carried by each of the'digitwheels to cooperate with a longitudinally extending groove in the shaftto return all of the digit Wheels to initial position. l

2. An adding machine, comprising in combination a casing, a plurality ofjuxtaposed toothed wheels having digits on the apex of the teeth mountedin the'casing to have independent movement in one direction 5 an openingin the casing with which axially alined digits on the digit wheels areadapted to register `means carried by said wheels and operable When theWheels have made a complete revolution in one direction to advance thenext adjacent wheel of higher denomination one toothI space;a'shaftvextending -parallel with the axis of the Said digit wheels; atoothed Wheel mounted on said shaft to have adjustment along the sameand numerals on the casing to indicate the sition of said wheel withrelation to .the digit wheels;v manually operable means to adjust suchwheel along its shaft; and a lever to impart movement to the shaft andconnected wheel, substantially as and for the purpose specified.

8. An adding machine comprising in combination a casing; a shaftjournaled in said of juxtaposed toothed wheels having digits on the apexof the teeth loose on said shaft and have independent movement on theshaft; an o ening-in wheels to advance the digit Wheels a digit wheelhas wheel to extend throughj'an.

.theoasing'througb which'an yahncd 10U naaepea row of digits of thedigit Wheels are adapted to he exposed; a toothed propelling wheeladjustable along an axis parallel with the axis of the digit wheels andadajivii'ed to mesh With either one of the latter Wheels to advance saidWheels in one direction, said Wheel having means to project through anopening in the casing to indicate the position of said Wheel; means torotate said Wheel a predetermined distance, means car` ried by the digitWheels to coperate when. a digit Wheel has been actuated by the prfpeiling Wheel and made a complete revolution to advance the adjacentdigit wheel of the next higher denomination one tooth space; meansconnected to the digit wheel shaft to manually rotate the same; andpawls carried hy the digit Wheels to engage in a longitudinal groove inthe shaft when the digit Wheel shaft is rotated. in a direction reverseto the movement of the digit Wheels imparted thereto by the propelling'wheel .to return the digit Wheels to Zero position.

et. An adding machine comprising in conloination a casing; a shaftjournaled in said casing; a plurality of juxtaposed toothed Wheelshaving digits on the apex of the teeth loose on said shaft; an openingin the casing through which an axially alined row of digits on saidWheels are adapted to he exposed; a shaft in the easing extending parailei With the axis of the digit Wheels; Va toothed propelling Wheelslidably mounted on said shaft and to rotate therewith; mear i to adjustsaid. Wheel along its shaft to canse it to mesh with either one of thedigit Wheels; means connected 'to said propelling wheel projectingthrough an opening in the caeii. u dieate the position of said Wheel;nieans carried by the digit Wheels to cooperaie when a completerevolution has been inn :rted to a digit yheel in one direction toadranee the adjacent digit Wheel of the next higher dei'iomination onetooth space; and means to rotat the propelling shaft, com.- prising atoothed segment having a lever, a pinion with which said segment meshesloose on shaft et the propelling wheel, a paWl carried h v said pinion,and a ratchet wheel fixed en the shaft of the propelling Wheel 'withwhich the paWl cooperates When the segment is moved in one direction tocouple the pinion to the shaft, substantially as and for the purposespecified.

lo. testimonj7 whereof, I have signed my naine. to this specification inthe presence of two subscribing Witnesses, this 15th day of any wie.

Geenen CORDTS.

'A itnesses:

C. A. t). ft-esami, CARL LAHR.

